Tweet ufficiale di Mitsubishi a riguardo:

Mitsubishi Motors

On Thursday 3rd March 2011, @mitsucars said:

Production of the current Lancer Evolution continues as planned.
As for its successor, regulations and market feedback will dictate its engineering package & architecture.

MMC has kept the Lancer Evolution sedan evolving as the brand's highest performing model in the global market. However, as the market's needs and demands change, MMC is considering not advancing the Lancer Evolution concept in the same way as before, but to find a different direction for the Lancer Evolution model to evolve. The new direction, the technologies involved, and corresponding products will be disclosed in due course.
TwitLonger: Production of the current Lancer Evolution continues as planned. As for its successor, regulations

Vedremo.