I have zero insider info so this is all WAG.
R&M is going quick/on time to be done in June ish.
We will see a limited and final run of TNA (2.0/ remix where it is the same game in a std cabinet and with the updated mods/add-ons). I would guess this will be extremely limited (150 or a timed release to meet exact demand of orders would be a cool think to do). That takes up 20ish weeks on the line with switch over and getting team rocking on that build again. TNA 2.0 is done around Oct.
We get the announcement of next title around Halloween 2021 with the game debut at the Nov MGC show (likely the first show back at a safe point in 2021). First 10 games delivered to the show and set up for play there.
As for title... I would love many of the ones already stated in the thread. I think niche adult comedy with cult followings work super well for the spooky model of 750-1000 games in a run. Voice assets/ music assets/ and a good license to work with is key to what they offer.
Biggest thing I would like to see for Spooky is slowing down the line to ensure more consistency and QC of build.
I see the primary lessons to be learned form R&M is they likely got just slightly too big too fast. Lots of new hands learning the ropes has caused some dumb mistakes. This needs to be addressed via "idiot proofing" a few things. Ex: dimple the tops side for precise rail placement is key. Bottom side is done and consistent. Top side needs that same engineering for play consistency.
Next biggest thing is concern over what code team they have. Eric P has set a new high bar. Spooky needs to bring on more support to code at this level and pace. Please invest in your code team Charlie