It's not "barely" linked. It just isn't 100% linked as it appears to be.
To clarify, certain events, phrases and stuff said and done in DMC1 deny aspects of DMC3. Of course with an open mind and a bit of will, we can ignore those stuff, but they are still there.
Let's start with some easy ones. Less important to the story and then move on to the plot stuff.
First, there is no Rebellion. Dante always used the Force Edge. It is implied that Sparda left the Force Edge as a memento and there is no mention of Rebellion ever.
Well, like you said it was implied, but not necessarily stated, when something is implied and not stated as a fact
it leaves room open for new ideas.
Rebellion is just a sword that DMC2 guys created. Even in DMC2, Rebellion's description reads: "A standard sword that Dante uses". No mention of Sparda or it having a true form or anything like that. They made it Dante's main weapon in DMC3 because they created a whole new plot-story about the Force Edge being locked in the demon world along with Sparda's power and Dante had to use something instead of Force Edge. There's not even a mention of Rebellion ever.
Ok, I agree that it being called a standered weapon is something to be considered. But I think the way they added Rebellion and turned Force Edge into the main sword wass done well. DMC3 explains how he got it and why he was able to use it with the amulets.
Second, the Perfect Amulet. The Amulet was originally like that. Perfect. Whole. Also it had only one color. Silver. However, DMC3 designers made Vergil's gold. Pointless. But also irrelevant.
Why they made his amulet gold I have no clue, I agree with this point.
Third. Vergil. Dante in DMC1 had not seen Vergil since they were kids. Trish says so: "you're the man who lost a mother and a brother to evil 20 years ago?". In that attack, Dante thought that Vergil died.
Lets say Trish was really just another person who had heard the story of Sparda as she was pretending to be. How was she suppose to know that Vergil and Dante met up a few years before. Trish had been playing dumb the whole time so why would she mention that?
Even when Nelo Angelo removed his helmet, Dante didn't recognize him.
When Nelo showed his face, Dante's reaction wasn't shown, the battle began right after that, who knows what he might have been thinking about, but it's not like he could have stopped him while he was attacking him and start asking questions.
And even when Nelo Angelo died (?) Dante only realized who he was because of the amulet. And even then, the only memories that resurfaced are times where they are both children.
Well, it's like what I told you when we were chatting. It was just one memory, it would have been too time consuming to do more than one, so they just did a childhood one, it doesn't really disprove that they knew each other as teens.
Despite how I love Vergil, I always thought of him as a major plot-hole.
He can't possibly be a bigger plot hole than Nero. XD At least Vergil existed in the first game.
They could try and make it a bit better, like Dante being surprised by Vergil's appearance.
Yes, I agree with this.
But a stranger walks into his shop, offers an invitation from his brother, and Dante is all like "yeah so?".
Yes, I agree with this too. But you gotta remember that Dante kinda has a "yeah so" attitude about everything. And if my dear identical twin was startin' stuff with me and being a douche after I thought he was dead for like 10 years I would probably be reluctant to show joy towards a meeting with him as well.
All of those stuff aren't like the most important things in the story or anything. But it gives me the impression that DMC3 guys didn't even try to use what was already said in DMC1.
Nothing but the best from Capcom.
Make the amulet silver, have Dante use Force Edge and instead of it make something else - a monument or something - that supposedly holds Sparda's poweer. Arkham never used Force Edge in a fight after all.
I dunno, dispite it's role in DMC1 I think it's final peice does it justice. I like what they did with Force Edge, I think it fits.
Btw, I would figure that the things they changed we're simply retcons so DMC1 and 3 are very much linked. In video games it seems that the facts usually lye within the latest addition.
It makes him a bit dense in DMC1, not realizing who Nelo Angelo was.
*Ring, ring, ring* Ahem, hello? What's that? DMC was a success?! People want a sequel!? We can still make money off this game?!
Employee: Ummm sir we kinda already closed the story.
Bulls*hit! This is fiction dammit make something happen! Dante shall be our new mascot!
Hehe, in all seriousness though, as long as DMC is fiction very much can be done with the story and done well if they could just find a good story writer. Even if Dante reaches SS4. ^_^