On the other hand, Bishop also has his fair share of fans and his own interesting story that stretches across several time periods, and Days of Future Past did not delve into that at all since he was such a minor character.
Instead, as Rob Liefeld told ScreenRant and as audiences saw in the final version of X-Men: Days of Future Past, Cable was replaced by Bishop, another mutant with a history of time travel.
On the one hand, Cable is arguably more popular than Bishop, so it makes sense that the latter would take priority over the former.