Persona 4: Dancing All Night is the next upcoming Persona game developed by Atlus. And more and more characters are being announced! Both Marie and Tohru Adachi will come to us in the form of downloadable content. The release dates for these DLC characters outside of Japan is not yet known.
If you are interested in seeing a full list of the confirmed characters so far, you can view them here.
Persona 4: Dancing All Night is set to be released in Japan on June 25, however the US version is set for a September 29 release.
If you cannot wait to get your Persona fix, you can consider importing a physical copy of the game once it is released in Japan, as all physical Vita games are not region locked!