no one thinks that, but this is what people know:
--T4 was bad. It was...awful. One of the worst movies in quite some time. Just horrible bad.
--T3 wasn't great, but it was OK. It pissed some people off in the end, but it was still a decent part of the franchise, greatly overshadowed by its predecessors. So, safe to say that it was at least disappointing for all fans, even though it wasn't nearly as bad as that crap with Bale. In the end, the last two attempts at Terminator films ranged from disappointing to very bad film.
--Arnold is old. Does anyone really want to see this old man pretend to be a terrifying murder robot again? come on.
--It's something of a reboot/reimagining. Everyone is sick of that crap.
--Everyone also knows that Predator just needs to show up and Terminator is STOMPED! It's hardly worth watching when such an outcome is known!