Complex sentence: It was reported that she would make a full return after a year, however the character did not return by the end of 2016 and nothing was heard about the character until March 2017 when it was announced she would be returning which she did on 18 May.
Split into simpler sentences: It was reported that she would make a full return after a year, however the character did not return by the end of 2016. In March 2017, it was announced she would be returning, which she did on 18 May.