Rapture
and
Protestants do the same thing, all the time. Study up on the history of premillenial dispensationalism sometime.
We don't all, by any means, buy the whole complex dispensationalist model, with it's multiple ressurections, multiple judgement days, and multiple returns of Christ (visible and invisible) scattered over a thousand plus years.
Of course not, but the claim that Protestant theology (what kind?) is some sort of crystalline, unchanging monolith totally and perfectly predicated on Scripture is just ridiculous. Y'all argue among yourselves on all sorts of things, and practically none of you agree with the original Reformers (meaning your theology has evolved quite a bit since their time), so claiming that only Catholic or Mormon theology evolves or adds anything to Scripture, while Protestant theology of any stripe doesn't, is patently and obviously false.