Your reasoning for this thread makes no sense.
If you're bored, just say that.
Time to bring up this age old debate... do the draenei eventually evolve into the... protoss? Do the Xel'Naga only masquerade as the titans First Ones, with the zerg of Zerus actually evolving from some yet-to-be-discovered alien species in the Great Dark Beyond?
Can Kerrigan's lineage finally be traced back to... the Windrunner family???
That makes no sense whatsoever. No different from your other posts, but still.
Starcraft and Warcraft are completely different franchises. It would not only make absolutely zero sense from a story standpoint, but this would actually DILUTE both franchises. Yeah, remember that word?
"Torturing someone is not an evil thing to do if it is done for good reasons" by Varodoc
"You sit in OG/SW waiting on a Mythic+ queue" by Altmer <- Oh, the pearls in this forum...
"They sort of did this Dragonriding, which ushered in the Dracthyr race." by Teriz <- the BS some people reach for their narratives...

Why would one unrelated IP replace the other? Despite what all the angsty man-toddlers here would have you think, WoW is still hugely successful/profitable: they've talked about mapping out another 20 years of the game.
You might as well ask if Overwatch will replace WoW, which is obviously a no as well.
The idea of being in an MMOC guild, with a bunch of perpetually angry/terminally online man-toddlers who hate the game but are too addicted to stop playing it, sure sounds like a fun way to play WoW.
/s
This thread didn't start great, and has been thoroughly derailed by its own OP into incoherency. Closing this.
"We're more of the love, blood, and rhetoric school. Well, we can do you blood and love without the rhetoric, and we can do you blood and rhetoric without the love, and we can do you all three concurrent or consecutive. But we can't give you love and rhetoric without the blood. Blood is compulsory. They're all blood, you see." ― Tom Stoppard, Rosencrantz and Guildenstern are Dead