Something triangular/pyramidal -- which could also be considered
sail shaped -- would make a lot of sense on this lot, wouldn't it? There are setbacks from the creek, and setbacks from the lake (right?) so the highest point has to be on the north-eastern corner of the block. The other renders we've seen for this lot have had setbacks that step up from the creek and cesar chavez. If instead of setbacks you sloped up from the creek/lake you'd get a triangular, pyramidal, sail shape. I think someone here might have once mentioned that the required setbacks are actually defined by angles. So angling the sides of the building may actually be a way of maximizing floor area.
In fact I could see something a lot like Ingels' "pyramid" 57 West on this lot -- flat on two sides (north and east) while sloping on the south and west sides.
edit: Something like this