Actually there is only Apokolips or Warworld in that picture.
Considering this is taking place right outside of Krypton (since the star in the middle is Krypton's sun, Rao) it can't really be Apokolips, as the planet isn't capable of independent movement. Though Warworld is mobile, and has a very similar appearance to Apokolips.
New Genesis isn't shown.
Also Warworld's weapons are powerful enough to defeat even Kryptonians. So it makes sense for the planet shown to be Warworld, rather than Apokolips.