I doubt our reactions will effect the story they already have in mind. But its possible
As the OP stated, many support Sylvanas to troll Blizzard into painting itself into a corner. I am not among those - but it is amusing to watch it play out.
I can see Sylvanas destroying the Sunwell, killing the Vulpera, making profit illegal to anger the Goblins, burning the Arcandor, unleashing termites upon the wood holding up Thunder Bluff and Thunder Totem, and slaying all the High Elves to raise them as Forsaken (just to get the Alliance players a bit more riled).
And when she is done, Blizzard will be sobbing in their corner, muttering:
“Look what you made us do!”
Such a scenario is doubtful, but amusing.