will they save iris

with only months left we have a very big part of the season will they save iris from a terrifying death but how we know they need some help in the sizzle reel we see that captain cold comes to help that is in episode 22 and same with KING SHARK! crazy right in the sizzle reel wally says "you trusted me and i let you down" now were talking does iris die or does she get saved who knows?