Will there be a metal gear solid 5

Metal Gear Solid: Rising will be released on September 24th 2010 and will be the final game and the first game from the MGS series to be released on Xbox, (cause PS3 is better!) Metal Gear Solid: Peacewalker is effectively a Sub-Series following Naked Snake or John who is Solid and Liquid Snakes genetic father on the PSP, Metal Gear Solid 3: Snake Eater and Metal Gear Solid 3: Subsistence (PS2) follow Naked Snake also.