Reading of the process the Haaland's adopted when deciding which club to join, it seems the final choice was either City or RM. One of their rationale was, "Do they need a CF?" I think that as Benzema was on a great run of form, the final decision was to join us. Therefore, it wouldn't surprise me if, when Benzema doe goes, Haaland will, at least, be thinking of a move.
Still, as previous posters have said, if in the next 2-3 years we win the CL and dominate the PL, then it's all been good.
All things must pass (mainly from KdB).