Even though EA Sports non-Madden and FIFA games are having a bad year in terms of sales and revenue, EA confirmed their MMA game will get a sequel but not in the near future.
Currently EA is working on another Fight Night game and still is deciding if they want to release a Boxing and MMA on an every-other-year schedule.
Most likely EA wants to match the THQ 2-year cycle for their UFC game instead of forcing a MMA game or boxing game in the annual cycle.
http://kotaku.com/5703745/ea-sports-...-says-producer
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In unrelated news, 343 Studios first Halo game is rumored to be a remake or updated version of Halo 1 but using the Reach engine. It is not expected to be a direct port with new graphics but at the same time not a re-imagined version like how GoldenEye 007 for the Wii was.