I've done the math and the combined company will have more than 50% of coasters in some states at their parks: Ohio, Massechusits, North Carolina, Missouri, Illinois, Virginia and Oklaholma will have more than 50% of coasters at the new Six Flags.
I am opposed to the merger as it means some markets where CF and SF are directly competing will have a total monopoly, for example Six Flags Discovery Kingdom and California's Great America are currently competing, if the merger goes through then they will be sister parks. Then add Knotts and SFMM and they have 4 parks in 1 state, as well as 49.5% of all coasters at those 4 parks. Expect less additions as some areas will have a theme park monopoly.
Could we see the Six Flags name come to the other parks? The new company name is using the Six Flags name opposed to the Cedar Fair one, and most parks that were acquired by SF have changed to Six Flags (name). Possibly we could see some parks get "Six Flags (name)" (Michigans Adventure, Valleyfair, Kings Island etc.) while the more historical ones (Knotts, Cedar Point) get "(name): A Six Flags Theme Park"
Finally could we see DC/Looney Tunes come to CF, with Peanuts coming to SF respectively? The press release said that they would continue to use them properties, and previous buyouts from SF/CF have gotten their areas transformed into DC/Looney Tunes and Peanuts respectively, like with Nick to Peanuts at the Paramount Parks.