If I remember correctly, it was stated that the events in Season 8 took place beginning about 18 months after the destruction of Sunnydale, so I can't see any way that there were any connections, if by that you mean situations that were or could have been happening simultaneously in both storylines. However, since it has been pretty well established and accepted that only IDW's "After The Fall" arc was actually canon, so the scene where Angel pops into reality and crashes into the big "Hollywood" sign MIGHT be interpreted as what happened immediately after the end of that arc. If so, that could be considered to be the point where both series came back into the same time frame.