An interesting concept for a twin engine Hercules powered by two of the A-400M with those huge propellers would be a real neat model. Maybe that will be possible when Revell releases the A-400M kit :^)
I have thought the exact same thing - I guess great minds think alike...or fools never differ...
A quick check of the power offerings of the engines:
C-130H:
4 x Allison T56-A-15 turboprops, 4,300 bhp (3,210 kW) each = total of 6240 kW per wing;
C-130J
4× Rolls-Royce AE 2100D3 turboprops, 4,637 shp (3,458 kW) each = 6916 kW per wing;
Speculative C-130TP400 twin:
2 x EuroProp International TP400-D6 turboprop, 8,250 kW (11,000 hp) each = 8250 kW per wing!