May be DLC in the future though one of the devs says here. I'd imagine that'd only be for a really huge significant update that adds another game mode or a whole new "campaign" or something.
Ha, I couldn't believe it either, in fact I had to google just to make sure.
It threw up this video, looks like there are plenty of clones taking advantage of their procrastination.
Maybe they thought it would devalue the pc and console versions if they went straight to mobile, it'd make a big splash that gamers would notice, they'd have to charge less on there and then people might start to see it as less of a "real game". It might damage the games credibility.
Keeping the slab prodders waiting won't be such a bad thing, I'd imagine it'll still sell well even if they do wait a little while longer.
Oh, there we go, coming this year. Hope it makes them rich!