As Flash is just about to confront Zoom and hopefully for god sake be the one that kills him, Zoom is speculated to kill off one of his friends or one of his friends at least is set to be killed off and these are the 4 that are most likely to be the finale's sacrificial lamb
Harrison Wells (who thinks he hasn't paid for his mistakes)
Still it would be much better if he would stay alive so that he can return for season 3 when dealing with Gorilla Grodd
Joe West (in case he stands up to Zoom again or distracts him to buy Barry time to get an edge on the Speed Demon)
Clearly since he's got a sense of humor, he should stick around for more seasons plus with Gorilla Grodd rumored to return as main bad guy for season 3 it would be worth seeing Joe freak out over a horde of gorillas rampaging through Cetral City
Iris (for being someone close to falling in love with Barry even though Eobard Thawne is the one who killed her in the comics)
or mostly Caitlin Snow
Yeah because other than talking him out of killing an arrogant and fear crippled Barry Allen and getting abducted by him, Zoom has shown his affection for her since having his past self hang out with her, and now because she calls him a monster just for standing people on Earth 2 up as the Flash Jay Garrick, saying his real name to him and other stuff that reminds him of his awful memory of his father forcing him to watch him murdering his mother and for ratting out Rupture's attack on the police at Jitters to Barry and his team, she is definatly the one that should die because Zoom killed off her doppleganger Killer Frost blowing the chance of extracting the meta human genes from her body and putting the genes into Caitlyn to make her just like her double and since Jesse has proved herself to be very intellegent and quick on observation and science, the producers of the show should definately consider killing Caitlin off and have Jesse Quick who also now has the speed force take over as the nerd girl of team Flash. After all what's the point of keeping her alive on becoming Killer Frost when that oppertunitiy has already been taken away the moment Zoom murdered her double. To find out for sure of who is going to die in the season 2 finale stay tuned for the remaining 3 Flash episodes