Angry Birds 2 will be 'bigger, badder, birdier'. But will gamers still care?

Rovio is teasing the release of a fully fledged sequel to its bird-slinging game, but the franchise faces a battle to stay relevant in 2015

It may be five years, and countless follow-ups, since the original Angry Birds catapulted the casual gaming market into the mainstream, but there's never been a fully fledged sequel: until now.

The game's developer Rovio has tweeted a teaser image for the game, the aptly titled Angry Birds 2, including a date - 30 July - and the promise that it will be "Bigger. Badder. Birdier".