The full gamelist has been revealed. From what I can tell, the US version is going to have more Japanese language games than English language games. That's odd, but I guess providing official translations would have been too much investment.
Gamelist, especially the Japanese games, has some real oddball stuff, such as Cho Aniki (bizarre bodybuilder shooter), and Appare! Gateball (appears to be a croquet game with horrible graphics).
Some of the Japanese titles, such as the Neutopia's, are present in both Japanese and US versions, so the number of unique games is in the upper 40's, rather than the advertised 50.
The multitap looks like a generic USB hub with a PC engine multitap shell slapped on it. We will have to wait and see if a generic hub can be used to add extra controller ports.
It looks like the accessories such as the extra controllers and the tap will all be white to match the PC Engine. Hopefully, there will be extra black TG16 controllers for sale.
They are selling the USB AC adaptor wall plug as an extra accessory, so I guess you just get a usb power supply with no way to plug it into the wall?
So far, I'm not sold. If they would have subtitled the Japanese games, or at least included the existing English language version of Dracula X, Rondo of Blood (even just the text), this would have been a no-brainer. Of course, it will get hacked, but I wish that Konami could just get it mostly right straight out of the box.