Hey there. I'm looking for a scenario that is extremely easy to prep for a VTT. Thinking of something that only has one map with it so there is not much editing? A short game? Simple?
Atcually, the maps for Mists of Mwangi and Penumbral Accords are identical, and it only comprises 7 rooms and a long corridor. Some of the events and critters are different, but that is a different subject.
If you are going to look at those, also consider, for follow-up scenarios, Voice in the Void and Eyes of the Overwatched, which also have sequences in the Museum.
Spoiler:
NOT Explosive runes!
Seriously, the Blackros Museum is probably one of the most-hated locations for PFS, although I dislike that opera house in Oppara more...
Not because they are bad places, but simply because they are places where bad things happen.
I have to ask - why are you after 1 map only to prep the game?
Scenarios average about 3 maps, and that's only very slightly longer to prep. If you're spending longer than 5 minutes on a typical map, something's wrong.
Avatar, that depends on how good your VTT client is, and how good you are at resizing. That also depends on whether you are are going to add a vision blocking layer to the map. Also lighting effects, etc.