The Artists For The Justice League

And there are a lot of them!

For Superman: samrkennedy and techgnotic

For Batman: eternalegend and memed

For Wonder Woman: artgerm and alexgarner

For Flash: rennee and kinezo

For Aquaman: meador 

For Cyborg: in here 

For Green Lantern: irvintustin and superman8193

For SHAZAM: danielmurrayart

For Darkseid: uncannyknack

For Bizarro: Ryan Savas

For Brainiac: noodlesshmoodles

For Red Hood: blondthecolorist 

For Sinestro: felipemassafera

For Black Adam: mauricioabril

And dimitrosw for Reverse Flash and Black Manta

For the minimalist design, check here.