Yes, but "Dota" is the only name that will have a legal binding. The rest are floating in the ether. Valve hasn't made any claims that Dota isn't a reference to Defense of the Ancients, so I'm not sure what your point is there. My point is that, legally, Dota and Defense of the Ancients will become separate entities.
That's not how trademarks work. For example, Respawn/EA couldn't release a game called "CoD", even if the trademark owned by Activision is for "Call of Duty". Same with Microsoft releasing a console called PS4 or Sony releasing a portable called 4DS, or...
No, it wouldn't, as it's a website for Defense of the Ancients.
It really would.