Is there any new progress on this fangame so far?

No, sadly. But there will be some spriting progress from me sometime soon. So, the River Reaper sprite will remain as it is, potentially with small modifications, but I do plan to make the Sans and Papyrus sprites even better. I have actually been working on Sans, so I am slowly making progress there. I do have some plans regarding SwapDust: Armageddon, though.

What are these plans?

I would list them, but then they would spoil this fangame for all of you, so that ain't happening. I will mention that you SwapDust: Armageddon enthusiasts out there might be surprised at what I will have in store for those of you that stick around.

Will this fangame have another revamp?

Maybe, but that depends on myself and the team. I and the team have had our fair share of our own stuff to be working on, so I will ask for you to keep being patient. I intend to take my time with working on this fangame, as well as my many other projects. I want to deliver the best quality fangames that I possibly can. Not gonna lie, I didn't have this mentality until the DTLG Team mentioned that in one of their posts, and I'm personally glad that they did. I do plan to be as original as I can with SwapDust: Armageddon so that it isn't yet another random and generic ULB AU.

Aside from that, that's all I got for now regarding this fangame. For those of you that have continued to stick around, I wanted to say thank you, and that I really appreciate the support that you've been giving me.