Nope. I'll go ahead and share my personal theory about how they are going to bring Tyreese into the show. Not wrapping this in spoilers, as it is merely conjecture on my part, but I have a really strong hunch on this one. Ready?
So, what will happen is, T-Dog will get bitten or killed in some fashion and, right before he croaks, there will be some sort of heartfelt interaction between him and another character (probably Rick) in which there will be dialogue along these lines:
"We never even knew your real name..."
"It's...Tyreese...gurgle..."
[Cue loud gnashing of teeth from Internet.]
Nice theory... I'll bite.