Look here: Leica SL vs A7 size comparison.
Photographyblog posted that size comparison picture between the new Leica SL and the Sony A7rII. Damn is that SL big …and for my taste a bit ugly :)
By the way, the Leica SL has Panasonic’s V-LOG and very likely also Panasonic autofocus system and other know how. A FulL Frame Gh camera may be on the way and this could certainly become a real Sony competitor.