They plan to have their first class in 2020 meaning yes you will be able to apply this summer if they get accreditation on time. Personally, I have a feeling Sam Houston won't have any trouble doing so, but MNCOM may or may not open on time. (They were originally slated to open 2017 I think and they kept pushing it back.)
One school that is for sure opening starting 2020 is California Health Sciences University College of Osteopathic Medicine. They're even listed already on the list of schools accredited by COCA. Also NOVA and LMU are expanding in 2019 so admissions to these two might become a bit easier.
If you have the choice, most would recommend that you go to a more established school of course.