Burnie Burns, the director of red vs blue has said before that he will continue to make red vs. blue even if there are only a few fans left.
So yes, there will be a red vs. blue season 11
yes
No, season 10 will not be the last season to Red vs. Blue. Season 11 will most likely becoming out this year (2013), and Halo 4 will probably be used to make the episodes.
Red vs. Blue Revelations
Season 6
The best Red vs. Blue season is season 5. It is the most funny of'em all (besides reconstruction, or whatever it's called).
Yes
Mark Bellman has: Performed in "Red vs Blue: Recollection Trilogy" in 2008. Played Delta in "Red vs. Blue: Reconstruction" in 2008. Played Delta in "Red vs. Blue: Revelation" in 2010. Played Delta in "Red vs. Blue Season 9" in 2011. Played Delta in "Red vs. Blue: Season 10" in 2012.
Red vs. Blue Season 9 - 2011 was released on: USA: 15 November 2011 (internet)
There is Relocated,Recreation and then Season 9
Dan Godwin has: Played Pvt. Franklin Delano Donut in "Red vs. Blue: The Blood Gulch Chronicles" in 2003. Played Additional Voices in "Halo 3" in 2007. Played Donut in "Red vs. Blue: Revelation" in 2010. Played Donut in "Red vs. Blue Season 9" in 2011. Played Donut in "Red vs. Blue: Season 10" in 2012. Played Sideburns Teen in "Nightmare Island 3: Rise of the Blood Queen" in 2012. Played Donut in "The Best Red vs. Blue. Ever. Of All Time" in 2012. Played Donut in "Red vs Blue: Season 11" in 2013.
Recreation
It already has.