Thanks to some quick interview quotes from 4Gamer we have a big hint coming from Kazuhiro Tsuchiya about a new game being in the works. From the sounds of it though there won't be a new game next year, but that it will start production. Here's hoping for Mega Man X9 in 2020!
Here's the full quote :
Kazuhiro Tsuchiya, Producer
Known for: Mega Man 11
“In 2018, we were able to safely release Mega Man 11. This is also a thank-you to all of the game fans. In 2019, I would like to make steady preparations for what’s next, so there may not be any major action, but I hope you can all watch over me with warm eyes…!”