Complex sentence: The stadium was expected to cost $110 million and to open for the latter stages of the 2016 MLS season; however, after announcing updated plans, this cost rose to $155 million and the stadium's opening has been pushed back until 2017.
Split into simpler sentences: The stadium was expected to cost $110 million, however after announcing updated plans, this cost rose to $155 million. It was originally expected to open for the latter stages of the 2016 MLS season, however the stadium's opening has now been pushed back until 2017.