First CBS would likely work a deal to pay Arte to air the 24/7 network (and drop ESPN).
Unless ESPN and Arte Moreno signed a short-term deal, that's not likely. ESPN/Disney would want a lot for ending the agreement early. Why would CBS want to spend money needlessly? They don't need Arte and the Angels before any current deal expires. KKAA has low ratings and this new network wouldn't make the station a winner.
This will be a deal between CBS and Cumulus to put sports on in LA, and to keep with the trend of moving sports, news, and talk to FM. The sports network ends up on an AM only to move news or talk to an FM.
KRAK AM was listed as "Riverside" to make the press release more impressive. The station is licensed to the High Desert. When has showed up in the Riverside/San Bernardino ratings? KRAK has been running ESPN, and they are a no-show in the latest PPM. When KRAK switches to the CBS Sports network, the ratings won't change much in the IE.