If you look at Deadline, they already admit that the numbers that they have are higher. Even Saturday is 600K higher than what Disney is reporting. Disregarding mixed signals, or a faulty source, that discrepancy is a wee bit interesting.
Outside of that, Disney is notorious for lowballing their estimates, often by a considerable amount.
Just going by OW, Toy Story 4 estimate was 118M, then it increased about 2.5% to 120.9M. Aladdin estimate was 86.1M 3-Day, then it increased 6.3% for 91.5M. Endgame 350M, then 2% to 357.1M, Dumbo 45M, then 2.2% to 45.99M. Mary Poppins Returns 22.2M, 5.8% to 23.5M. Solo 83.3M, 1.3% to 84.4. Infinity War 250M, 3.1% to 257.7. Black Panther 192M, 5.2% to 202M.
Yeah, not every Disney movie lowballs the numbers, but a lot of the time, it does happen, especially to the larger openers, and there's a substantial amount of money left on the table here, . By further comparison, Beauty and the Beast did 170M for estimates, then had a 2.8% increase to 174.75M. And what do you know, using that percentage brings us to 190.2M. Now do I think 190M is a lock for actuals? No. But the precedence is certainly there, and I fail to see why this movie would act any different compared to some of the other mega openers listed.