According to this post by Matt Sprange, Mongoose has no plans for any further 4E titles.
Mongoose Publishing :: View topic - Is Mongoose Done with 4E D&D?
According to the "State of Mongoose 2009", they are switching Wraith Recon from 4E to the Mongoose RuneQuest II ruleset.
Mongoose Publishing :: View topic - State of the Mongoose 2009
Mongoose Publishing :: View topic - Is Mongoose Done with 4E D&D?
According to the "State of Mongoose 2009", they are switching Wraith Recon from 4E to the Mongoose RuneQuest II ruleset.
Mongoose Publishing :: View topic - State of the Mongoose 2009