Zub mentioned Storm, but considering the time frame, I'm not sure how much of a comparable example that is. Things aren't quite what they were in the 80's. Not sure how "classic" Storm's time being powerless was for readers of that period, either.
We also don't know how well Sam'll end up post-story, which is the crux of the worry, anyway.
I mean, I for one would be fine with that provided Sam didn't loose his heritage as a Nova for the sake of it.