Ok, i´m excited about this, and of course, per tradition, fans will cry complain that Godzilla will appear in a japanese animated show even before the first sketches appears.
But, ok, now, people, question, how you, as in you "yourself", imagine a good Godzilla anime, could be something like the HannaBarbera show, and/or the Tristar 90's show tthat was basically the HB version, but updated, or a more cartoony show were the characters make fun of the franchise (can be both lighthearted but with bits of black humor)
or this
What I consideer a good anime would be one that incorporates Godzilla and co with other TOHO franchised, as in an expanded universe, imagine a story ark with Godzilla fighting a Mysterian invasion (showa Godzilla vs Showa Moguera army), maybe even including unmade toho stories or creatures, (Godzilla vs Redmoon, Bagan, etc), I would love to see that.
Or course, it can be also the inevitable bishoujo/(or bishonen) version.