It's absolutely not too early. They should have started to gameplan them the minute the schedule came out.
Victories are difficult to collect in the NFL, especially on opening day against a division rival in their stadium on national TV.
Since the NFL merger there has been 52 Super Bowls. In 32 of these seasons the eventual Super Bowl champions started out 2-0. The Super Bowl champion has started out 0-2 in 3 of those 52 Super Bowls. Therefore, getting a fast start is critical.
The Cowboys are 19-5 when facing a division rival on opening day. They are 9-3 when that is an away game.
The Cowboys most common division rival on opening day is the Giants, they have met on opening day 9 times and the only Cowboy loss came in 2016, Dak's rookie season, when Terrance Williams didn't get out of bounds. The Cowboys then went on an 11 game winning streak.
The Cowboys are 4-4 when playing game #1 on Sunday night. All four wins came against the Giants. However, they were all home games. This will be the first time Dallas goes to New York on a Sunday night game.
The best Cowboys quarterback performance on opening day came in 2019 by Dak against the Giants. He was 25 for 32 for 405 yards, 4 TD's and 0 INT's. He was not sacked once.
The Giants run a 3-4 defense featuring OLB's Kayvon Thibodeaux, overall #5 pick in the 2022 draft, as well as Azeez Ojulari and Jihad Ward, both former 2nd round picks. The LB's should be much improved.
The D-line is anchored by Pro Bowler sack leader Dexter Lawrence.
The Giants currently have injury and depth issues at CB
The Giants have a dangerous runner in Barkley. Their OT's are both former top 7 overall draft picks. In fact, the Giants have drafted 5 top 7 overall draft picks in the past five seasons. In all, they have drafted 7 players in the 1st round over the past five seasons.
The New York crowd is going to be up for this game. The Giants aren't better than the Cowboys but if the Cowboys don't have their heads in this game, it would only take a few mistakes to make this one a nail biter.