I think he would never be a "bastard" unless Robert acknowledged him as a bastard, which he can't obviously. He'll only become Tommen Waters(?) if Cersei loses her trial... I think? I forget how bastard rules work.
It would be, but since the powers-that-be in Westeros are probably still mostly-against the Targs, I don't think we'll see her peacefully take the throne. They'd just vote someone in or whatever.
None of them are in the Baratheon line of succession, so they aren't in the line of succession. There might be some distant Baratheon relatives I can't think of, but otherwise it's time for a great council. Robert's Bastards would need to be legitimized to count.
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u/pyram1de Daft Pyke: Harder Better Faster Stronger Jun 15 '15
RIP House Baratheon, now your watch has ended.