The only news that i can think of that would make most of the DOA5 players happy would be a major update adding extra stuff for a GOOD price that worth the value of that update.
A complete version would be nice but some won't like the fact they have to pay again for a "more complete" version of a game they already own like with NG3 and NG3:RE case. also some people that bought a lot of DLC may not like that.
DOAX3? not my cup of tea, others for sure would like it, i would only buy DOAX3 if it actually is going to be about the various activities and wont be a boring game just about the fan service and / or a major grind to collect swimsuits.
the next DOA after DOA5? (DOA6 or w/e they will call it) no chance of that being released so soon.
Anything else would be a real surprise. --- Windows has detected that you are using a Microsoft product and is forced to shutdown. P.S. I miss freedom of speech