Been a while, huh?
I think one thing that could be done in a potential Trilogy-For-Console/Portable Hybrids is including a new game with a new engine that could possibly produce a grand brand new installment further down the line. It could maybe be, like, 10 fields long and every field could be one exit, similar to Sayonara's Shortest Path. It could possibly be just more Sayonara, but with more realistic physics (like getting stunned from falling too far maybe) and trace amounts of elements from the first two games, like respawning enemies and a rudimentary scoring system where you have to finish the field to keep all of your points (similar to Sayonara's backpack collecting). Field 9 (it would start at 0) could be a new and random, but unintimidatingly easy boss that leaves the possibilites for a new game open to the imagination. The developers could even license an existing engine to give the game current-gen qualities on the cheap. Put this game alongside the three other games (which at this point will require little or no effort to remaster) and you have a package that even those who bought the DS game, the Vita game, and the PC versions could justify buying again. Plus it would be enough content to justify a purchase for new players at $40 dollars when the Trilogy wouldn't be enough, and lead to an amazing new installment in the future using the same engine after tiding us over.
I get it, Umihara Kawase isn't a big franchise that some company needs to pimp out and respond to fan input to keep profits and positive images consistent. Even those on this nobody forum know that. But I'm open to the possibility that someone will want to make a new one someday. This would at least help make it profitable.
Experiencing a new Umihara game, with all of its tricks and winding paths, is a magical gaming experience that I would gladly pay modern console prices for. If there were a PS4/upcoming Sony Switch version, I'd buy that version too.
EDIT: Forgot to mention, the new Umihara game with the new engine, along with the appetizer game in the remastered collection would also have to have time limits as well as points. Something I forgot about given how fast I go through Umihara levels. Just thought that would go without saying.