No it doesn't... TOR is not canon... just like K1 and K2... So they have the creative license to do whatever they want aslong as lucasfilms give them the green light... It would be more likely a K1 remake than a K3 IMO to make the story canon
Ugh. No. No more remakes. Please. If Disney wants to canonise KOTOR, it can canonise KOTOR. They don't even have the excuse of being worried about their new continuity since the KOTOR era is so far removed from anything in Disney's new verse.
Now, since SWTOR is... yaknow, still an ongoing thing, Disney is almost certainly going to want to capitalise on that by linking any new KOTOR to it... which sadly means it'd have to be chained to their absolute abomination of Revan, the Exile and related's treatment, unless they wanted to totally retool the entire setting. But I didn't exactly like any of Disney's other reboots of the various Star Wars eras, so that idea appeals to me possibly even less.
Basically, Disney's caused the situation where everything they touch in Star Wars fills me with ominous dread.
The problem I see is that a KOTOR 3... well, it now has to follow on from and/or incorporate SWTOR's take on it all. And, put bluntly, I hate SWTOR's treatment of the KOTOR material.
And on a related note, I've been substantially less than a fan of Disney's reboot. So, sadly, I feel a KOTOR 3 is now at the point where... well, it's simply too late in my opinion. I doubt I'd like it and I even suspect it'd end up infuriating me.