I really hope they don't pull a "Wes isn't dead" twist
Though Wes had important ties to a lot of the main characters, he was horribly written. Unlike other members of the Keating 5, he was never given a distinct personality and his motivations for various things were rather vague. He was quite boring honestly.
And his relationship with Laurel never rang true.
His death was a major turning point for the show, and I feel it has made all of the other characters more interesting. But if he turns out to not be dead, all of the emotional weight of the last few episodes will completely evaporate. In addition, it would ruin a chance to shake up the status quo.