On February 25, Canon USA announced two new cameras – the EOS M50 and the Rebel T7 (aka 2000D). However, another Canon camera was also introduced that day, but it wasn't announced in North America. The EOS Rebel 4000D (which will eventually be called the "T100" in North America) was announced by Canon UK alongside the Rebel T7/2000D, and the body is positioned as the lowest rung (and lowest price option) in Canon's DSLR lineup. The only reason we know the EOS 4000D will be called the EOS T100 in North America is because the camera body was listed in a recent Digital Photo Professional software update posted by Canon USA.
So what's the difference between the Rebel T7/2000D and the T100/2000D? Here's how the two bodies compare:
Rebel T7/2000D Specificaitons
Rebel T100/4000D Specificaitons
Not mentioned in the Rebel T100's spec list – a plastic lens mount – has been incorporated to keep production costs to a minumum.
As for when the Canon EOS Rebel T100 will be available in North America... it's hard to say. Even though the Rebel T7 was announced on Monday of this week, it's still nowhere to be found at retailers, and the T100, according to Canon USA's marketing department, doesn't even exist (yet).