Ugh.. Yeah of course you can do so. Who cares ?
As for the evidences, I've actually listed all of them in a previous post.
Alleria, Umbric and Vereesa wanting to bring Silvermoon into the Alliance. Shaw wondering if there're still Alliance suporters in Silvermoon and if Alleria's statement about Silvermoon was from her deepest dreams, or if she really saw the truth. The Sunwell threatened by the void... Void whispering into Alleria's ears to convince her she's the true Queen of Silvermoon.
Turalyon telling the players he WANTS to reclaim former Alliance holdings (Hello Silvermoon !).
Blizzard usually doesn't mention something for nothing. They always have something in mind.
IF Silvermoon's story is really OVER, then Blizzard wouldn't have cared to write all these things just for fun.
If you don't trust these hints, then you're pretty delusional.
I'm not saying Silvermoon will be Alliance. But at least Silvermoon will be contested by both factions. That's for sure.
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You're afraid of what, exactly ? That something terrible will happen in your beloved capital ?
Why didn't you ban me already after all ?
If these predictions are not going to happen that's pretty simple. Just ignore them