You're right...Chris did ride off into the sunset..But Chris is the MAIN character...Of the entire series...As much as it pains me to say it, no character sums up Resident Evil more so than Chris Redfield...The only way to end his story will be to kill him off (Tastefully), or straight up SAY that his story is ending...
Jill has not been a MAIN character for a long time until Revelations came out...And since it's set in the past, it really has no relevance to the main characters of the years 2009 and up...Which is where we are now...Jill was not a MAIN character in RE5...And she was in RE1, RE3, RE: Umbrella Chronicles-Umbrella's End, RER, and RE5...She needs a break...So does Chris, but if any character is to be used several times, it would be him as he is the MAIN character...And I'm not biased, because I don't like Chris...
Leon should stay as well...He has his trilogy of movies that are cannon to the games, and if you play Ada's storyline in RE4, you'll find out he DIDN'T have closure because of how the game ended...RE: Degeneration CLEARLY stated that Claire had served her time, and shouldn't be in the games anymore...It also CLEARLY stated that Leon and Chris are still fighting bio-terrorism...
It's just not good story telling to bring back characters that had very good closure 16 years in the past, just cause fans wanna see them again...Sherry is a good example of how it's done RIGHT...Sherry did NOT have closure, and fans were SUPPOSED to be left wondering what happened to her...That's not the case with Billy or Carlos for example...
Oh, and Jill has had MORE screen time that Leon if you're strictly talking games...Jill is in the six games listed above, and Leon is in RE2, RE4, RE: Darkside Chronicles-Operation Javier, and RE6...Which is only FOUR games...If you wanna count the cannon RE movies staring Leon...Right now that's only Degeneration and Damnation...Making it 6...So he's had the SAME amount of screen time as Jill...
I think I've made my point...