They already teased cloud of darkness for the next htbf. They haven't made you get a gem to do Siren and she doesn't drop anything from her previous fight that still gets used today so that's on the table. Provenance Watcher has never been touched again even if it's not SoA.
I'm also very good with them doing a much harder version of Sinister Reign for SoA. I don't care that they made a Master trial that fails to motivate the majority of players to even step foot into it because there are no rewards. Feel free to make it the training wheels for the Master Trials...but again with gear and rewards.
Ilvl Limbus is hopefully the beginning of them giving us a mini 75 era where everything is side grades and the ceiling is r30 ody gear and Empy+3. NEO NEO NYZUL isle to make ambu +3 upgrades and trick people into doing tokens? EINHERJAR HELL MODE since we never got to go fight in Valhala, new gear purchasable with ichor? There is plenty of interest for Dreamland zones for Dynamis for relic upgrades. They should go back and actually make something of Campaign and the various battlefields since Wings never really got a time to shine on it's endgame and the beastmen models are very good.
I see what they put out as the possible road map for this year as a lot more attractive, ambitious, and achievable than the last couple years.