I'm pretty sure Canal House & Pillows Grand Boutique Hotel Maurits at The Park will be available via MMS after the relationship with SLH officially ends.

The 2 Sircle hotels also has high chance of joining.

The 2 micro-hotel in rural setting may join, but with 4 and 14 rooms, don't have much hope of redeeming points there.

I think the 2 most expected are Soho House and Conservatorium, but they're expensive and can/has been doing well on their own.

Anyway, just give them time. This is only the first batch of integration.