No...did you click on the the Black dude\'s body in RE3? It said he was mortally wounded (litterally said that, don\'t believe me, load up RE3 and click on him). Not dead. Now...how he survived long enough to RE2 (which supposed to take place 24 hours after RE3 first half) if he was mortally wounded ...beats me. Capcom isn\'t known for realism you know.
I will agree that, in that terms, Claire looking for her brother, is a side story in the scenes that its not the main "bring down Umbrella" story, but at the same time, we find out a lot about Umbrella in RE:CV (like the co-founders of Umbrella, and potentially, a company that will be a continued threat if Umbrella were to fall [the company Wesker now works for]). However, RE2, Claire looking her brother again, Leon, all he is was just a rookie cop, both got mixed in this mess thanks to Umbrella\'s accident. Sure, we get things like who made the T-Virus etc. but other then that, not much different in terms of advacing the story then RE:CV. RE3...Jill\'s escape. Found out what happen to Raccoon City...maybe a little more on the doings of Umbrella, thats about it.
Oh, and Wesker, in this pic from the FMV intro of RE1, his hair is blond.
....well, the stupid site won\'t allow me to view the screenshot here. I will try to find another one. But his hair is blond.
[edit]Now, a few things I didn\'t cover in my first reply, that I want to say now.
Jill not being the brightest person in the world. Well, RE1 is...ummmmm...one of the corniest games in terms of acting I have ever seen. Afterall, who can forget wonderful pharses like "Jill DON\'T Open THAT door!" Or "Jill, you almost became a Jill sandwitch!" Hahahehehoho.
Steve changing. Thats one of the known differences between RE:CV original and RE:CVX. Why they change it? I don\'t know. Probably to make him look less like Leonardo DiCaprio (which I keep hearing).
As for RE0, well, first heard about it, more plot holes from Capcom. Afterall, Rebecca, like the other charecters, don\'t appear to know what they are going into. Yet, if Rebecca had a mission before hand, then she must\'ve known something, right? Now, I can\'t say much more then that since, Capcom has yet to release more info on the game.