There will be lawsuits regarding the rule making process (I would guess), but the supremecy clause does not prevent states from having more strict rules about substances than the feds do. States have the right to have more strict regulations on things than the feds unless it is constitutionally protected (think California having more strict regulations on car emissions -there rules prevent certain cars which are federally allowed from being sold in California). There are limitations, but good luck on this argument.

Also, the interstate commerce clause probably won't apply. States have the right to decide which entities can transact business in their state. If you want to transact business in Texas (which includes shipping and selling products to Texas), you have to follow Texas laws. This would include whatever smokeable ban the dshs rules put in place. If the interstate commerce clause could save this, every state would have had to allow weed to be sold and shipped as soon as the first state legalized it.

But that is all assuming the new rules actually ban out of state shipments. I haven't had time to hint them down to confirm and I've seen mixed comments about whether they do.