Romero is a legend, but I’m not sure he understands doom too much these days. Especially if he’s going to charge for levels. (Edit, it’s a “Full nine-level SIGIL II WAD + 2 Deathmatch levels”, and two soundtracks)
I watched him play myhouse and it was shocking how little he reacted to it. He didn’t seem to notice any of the black magic going on around him, I think he even just turned it off with a little “ok there’s that” shrug.
To be fair, a lot of the “isn’t supposed to work” stuff in MyHouse.wad isn’t really new to Doom. It’s not like the author invented some astonishing new techniques. It’s just that the presentation is incredibly well done.
Like, room over room stuff was more or less figured out as soon as people started using the Build engine. It was just a matter of time until this stuff was available in Doom. My guess is that it’s been possible for at least 20 years.
A working Daikatana is likely never to happen, to be honest. The game was overly ambitious for the time, and would not sell enough in the current market to warrant another attempt. It was an interesting experiment, and I thank John Romero for his contribution to the scientific community, but I don’t see another Daikatana ever being released.
Half Life 3 and Portal 3 would probably release first.