I think he would've certainly given up on Sri Lanka series, but 3 first class hundreds and poor series' for one of Compton, Hales and Taylor, and his name will start being mentioned again. I think it's 50/50 whether or not he'll play another test. There's not exactly depth in the batting department.
One thing that does count against him is the fact we aren't playing a 'big team' this summer. 1 down in an Ashes series, with out of form batsmen and an injury- Bell walks straight back in the team. This summer, they're more likely to want to give somebody like James Vince a go.