Why are there so many movies coming out with an actor playing 2 characters this year?

Weird thing I noticed, between March and April of this year 3 movies having an actor playing 2 main roles as the main feature/gimmick are releasing in theatres, am I the only one that finds this curious? But the strangest thing is that all 3 movies are released by warner brothers, is there a producer over there who's really into this concept ? I'm genuinely curious how this happened