On sequencer.de 'CB' raises a few interesting points, Forum • Neue Roland Boutique oder AIRA am 9.9. - Gerüchteküche
909, 808, 303 re-issue in limited edition TR-9, an expanded TR-8 with individual outs and sample input
Jupiter-49: the analog part of the JD-XA
System 8
S-9: Sampler with V-Synth capabilities and digital part of JD-XA
More boutiques (a modular derivative)
Of those, i only expect the JD-XA sibling to be true. It would not make sense to do a 4 voice competitor to Minilogue for a higher price, so it will rather be 6 or 8 voice, yet cheaper than DSI.
S-9 would be great, but i expect rather something like an expanded Volca Sample or an MC-909 type of sampler.