Krauser will appear in the Darkside Chronicles.Because dammit, he sure as hell acted like he and Leon had some backstory together in Raccoon City.
Javier Hidalgo was possibly highConsider the fact that during the final boss battle, Javier is laughing madly and talking of possibly "absorbing" poor Manuela into him so they can be together forever, only to suddenly ask Leon/Krauser to kill him at the end of the battle. He was on drugs up til that point, wherein the relapse occured and he wanted to die now that the high wore off.
Chris, Claire, and Krauser are all infected with the t-Veronica virus.The games state that the t-Veronica virus is highly infectious. Yet these three should be infected. (Hell, maybe even Leon should be, too.) To elaborate, Chris and Claire (and Wesker) had to deal with Alexia flinging her infected blood, yet they do not end up infected. (Maybe the combusting-on-contact-with-air kills the virus?) Claire could have possibly been poisoned by Nosferatu. Steve was also a bloody mess when he died. If Claire so much as had a papercut... Javier ends up releasing spores, which infect the surrounding environment. Krauser has a Canon open wound. You do the math.