Probably not the most surprising thing ever.
Source: http://kotaku.com/the-2007-video-pitch-for-a-cgi-zelda-movie-well-probab-1000557061Kotaku said:A job posting appears to suggest a sequel to last year's well-received open-world racer Forza Horizon is on the way. An agency job posting for unnamed Midlands-based racing developer matching much of the text of an opening on Playground's site word for word mentions that the studio is "working on the next edition of their successful racing title."
Additionally, on their CVs, Playground's creative director and studio director says they are "working on an exciting unannounced title for Xbox One," perhaps further suggesting the studio is handling Forza Horizon 2. All the contract positions on Playground's site specify a length of about nine months for contract work. Given that and the two year cycles for mainline Forza Motorsport titles, it does not seem unreasonable to venture the spinoff sequel could land sometime in 2014, sandwiched between this year's Forza Motorsport 5 and a likely Forza Motorsport 6 in 2015.
Playground is also starting up a mobile games development team, according to a handful of openings on its careers page. The openings don't offer much insight into what sort of mobile titles Playground will work on, but one posting does specifically mention the studio is looking for candidates with Unity experience.