Nah, that was Howland Reed
I mean I could see some situations where he'd refrain from going to the Night's Watch, but there would have to be some other compelling reason.
Oh, and in general his death is probably still the most iconic moment of the series, you don't seriously want to take that away.
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They won't do that though. GRRM said that he doesn't want that to happen either.
The spinoffs will be about some other stuff.