There have been rumors about a merging of Kruger and ALG. I can't tell you whether it will actually happen.
Personally, I prefer a healthy and active Rheinland mining faction (DHC-) to two struggling and dying off ones.
So, if I was asked, I would say: join DHC. Pavel and his gang are doing a great job and they will beat IMG| in terms of activity for the first time in... likely years. Congrats, by the way.