A new Ice Age and rising Oceans are basically mutually exclusive. Ocean levels are controlled by average water temperature (thermal expansion) and the amount of water that is locked up in ice caps. The last one of these nonsense scare stories they came out with was based on "modelling" of the AMOC (Atlantic Meridional Overturning Current) that used an assumed geometric increase in fresh water runoff from Greenland, culminating in something like 8 times the total amount of water trapped as ice running off Greenland before it had any sort of significant effect on the AMOC. These sort of scare stories are all fucking nonsense. Transition into and out of glacial periods in Earth's current Ice Age is controlled by orbital mechanics, i.e. Milankovitch Cycles. There will be minor changes within the larger cycle, but overall, the current ~100k year cycle of 20k years interglacial / 80k years glacial will remain unchanged. It's just retarded at this point.