[Roger Darthwell]

An update a month after the sale:

[*]Shows on the chopping block: DC's Stargirl and Nancy Drew are on their last seasons; The Winchesters and Walker: Independence expected to go next. (Deadline)

The Walker prequel is, indeed, going:

“Walker: Independence” has been canceled at The CW after just one season, Variety has learned.

The series served as a prequel to fellow CW show “Walker,” which was just renewed for Season 4 at the network.

From variety.com 

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Big blunder for Nexstar: CBS News' eight CW affiliates will drop The CW this fall, and transition to indie outlets.

3 of their stations in these markets are "on track" for the switch, according to Nexstar:

Asked about last week’s long-expected news that eight CBS stations in major markets are ditching their CW affiliations and going independent, [Perry] Sook said three Nexstar-owned stations in the same markets appear to be on track to become CW affiliates

From deadline.com 

So I just made a little search and I found out that Nexstar has stations in 4 markets instead of 3, the markets in question are Philadelphia, Tampa Bay, San Francisco and Sacramento, but CEO Perry Sook said that only 3 of these 4 stations will make the switch, therefore I am making a humble prediction that the new CW affiliate stations are going to be
WPHL-TV (MyNetworkTV, replacing WPSG in Philadelphia)
KRON-TV (MyNetworkTV, replacing KCBW in San Francisco)
WTTA-TV (MyNetworkTV, replacing WTOG in Tampa Bay)
Nexstar also owns
WFLA-TV (NBC in Tampa Bay)
KTXL (FOX in San Francisco)
Overall I think that the MyNetworkTV affiliates are going to be the ones that will switch to The CW in September, also I just can't see the NBC and the FOX affiliates switching