Well. David Yost is returning in the newest series to play Billy as the mentor to the current Ranger team.

Power Rangers Cosmic Fury | Theme Song #powerrangers...

oooh

They're apparently also using at least some bits of Kyuranger, which is an interesting return to form.

Honestly, that's one way of tying back to the originals now that JDF is gone. And, also, making up even just a little bit for the way he was treated back in the day.

With JDF gone, ASJ's legal woes, and Thuy Trang gone, it really is down to Yost, Jones, and Johnson. And Johnson (rightfully) has different priorities and wants a (deservedly) higher paycheck than they were willing to offer for her return, so.

Yeah, she's moved on to different things and different work, enough that it'd be an interruption.

also it feels right considering how badly production treated Yost back in the 90s

it's nice that he's getting the respect he deserves