You can always tell Ven apart from Roxas and Sora due to their battle stances for 1. And Ven just has a completely different demeanor really, though Ven has his serene moments as well.
Fixed that for ya, but yep. Ven's battle stance is unique not to mention their attires are also different despite being similar. Ven wears a high-necked black shirt underneath while Roxas has a black jacket that leaves his throat bare and that X-shaped zipper pull.
Not to mention his upper jacket has way less black than Ven's.
And I won't go into the differences of their wristbands again now.
Yes I cant tell the difference, I just feel he does not need to have a psychical form in order to come back, (xion as well.) I feel it may be a little weird having Roxas/Ventus fighting together.
Though Roxas did say he thought he would be fine inside of Sora, but he isn't apparently. What would you like to see happen to them Seph?
You gotta be kidding me?
Even when the first video of DDD came out and some idiot made up the fake translation that Roxas was apparently telling Sora to stop calling him Roxas but Ventus instead (most likely another one of those idiots who still think that Roxas and Ven are the same) I already knew it could only be Roxas. Why? Because he had the black coat, his whole body posture was different than Ven's (who's almost always more relaxed while Roxas often takes a stiffer, attention-stance) and it was Roxas' theme playing, not Ven's.
Then you tell me your definition of "coming back" please?
Roxas IS already fused with Sora so there is no need for him to "fuse further" or such crap. He sleeps inside Sora, just like Xion and Ventus.
I really don't see what would be weird with that just because they look alike. So going by that the picture above and the last part of the opening had you creeped out?
Indeed, he said he
thought it would be fine being Sora, that is a callback to the end of KH2 where he came to accept his fate of disappearing despite him always having wanted a life on his own.
Also remember that he doesn't know that he apparently has a heart. When Sora quips out and says to him that "you're you, we're not the same." and "You should be able to exist as
yourself." what does Roxas do?
He
smiles, then being reassured that it really "has to be you(Sora)" who's the one to save everyone.
Ventus is a no-brainer, of course he needs to get his heart fixed and come back entirely. But I can't say that I am not hoping for Roxas to get his wish fulfilled and become a person on his own. When Young Xehanort talks with Riku about the original Organisation XIII he tells him that Roxas was the ideal 13th vessel for Xehanort's purposes, but it didn't work because Roxas proved to have developed a too independent sense of self.
EDIT: However, that has by no means to mean that Roxas has to be one of the seven lights of the X-blade.