Everyone is here! (at least the ones that matter :-)
Captain America, Captain Marvel, Superman, Batman, Wonderwoman and some other graphic symbols...
Printed using 0.2mm layers.
The simplest way to achieve the 3 color effect is by pausing the printed at a selected layer, use the controls only!, move the printing head up and to the side, then retract the filament (remember, with the controls only!!! - no touching) replace to another color , extrude a bit to get the flow going and just resume the print.
I've included 3mf files that might help with multicolor prints.