I'm liking the sound of a cheaper model. Leica L glass might be stupidly expensive, but if Sigma are also joining in and Panasonic are making their own lenses then things could get very interesting indeed. IBIS too! How much can we trust in that? as up until now the strong rumour was NO IBIS. These might well be the kind of cameras that you only need1-2 lenses and you're good [bit like the Fuji GFX] Cannot see them being aimed at the sports togs.
TBH, if Panasonic had just used the G9 shell and controls and stuck a FF sensor in there it would be a proper beast. If this new model is going to be even better than that, I'd be scared if I were SoNiCan