Where was/is his ROTJ lightsaber in the last film?
It will.
I agree. Honestly, I kind of expected Rey to go find his ROTJ lightsaber since the Anikan one was broken in TLJ, but from the trailers I guess she just fixed it.
The novelization has a scene at the end where the Caretakers find Luke's lightsaber in his hut and they collect it. So he still had it.
Awesome, thanks! Hope it makes an appearance in this film.