Let's not get ahead of ourselves; nothing has been announced regarding a Tomb Blaster re-style into Forbidden Tomb for 2021 by the park.
If it does happen, it will probably be as cheaply done as this year's, ahem, "upgrade", and not really be an improvement. I imagine they'd probably just turn off the targets and remove the guns, rather than actually remove the targets (see the start of the ride...).
I used to like it when enthusiasts who worked in the industry kept quiet about (any potential) future plans, and didn't leak stuff, rather then tell people on the internet so their e-penises can match the size of their egos.