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human
[X-Men Movie Universe] How radically did Wolverine change the timeline?

**SPOILERS:** Minor spoilers for Deadpool, and some pretty major spoilers for "X-Men: Days of Future Past".

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At the end of "X-Men: Days of Future Past", Wolverine essentially has amnesia from 1973, when he temporarily drowned to death, to "The Future" (which is really Logan's Present?) when he wakes up again. 
Logan has no memory of this new timeline, despite technically having existed in it. 

The important part here, is that everyone who had died in Logan's future (and some of his past) is now still alive. 

Now, in Deadpool, we see Colossus again, except that he seems to be older, and now has a thick Eastern European accent. 

My question is, is this a result of Logan changing the timeline? Did he change so much that he changed where Colossus grew up, and maybe even who raised him?

Or are these two movies existing in different realities? It doesn't seem that way, thanks to certain fourth-wall-breaking references Deadpool makes to the actors who portray Xavier. (Although, even he mentions in this moment how confusing the timeline is getting.)
gpt
> Now, in Deadpool, we see Colossus again, except that he seems to be older, and now has a thick Eastern European accent. 

Well, the age thing... it's been 10 years. People get older.

As to the accent: because of the timeline change, some students are pulled to the school at different points in time - certainly Logan was there sooner. And because of the rather spectacular events that were broadcast, popular opinions of mutants may have been different. 

In the previous timeline, Colossus may have come to the US earlier in his childhood, so lost his Russian accent. In this timeline, because of less persecution, he may have come to the US at a later date, so he retains his accent.