"They" could ban anything. "They" could ban EVERYTHING. "They" could pass a clone of the original "AWB". "They" could go full on "Australia" and confiscate everything.
ALL of this is purely conjecture. NONE of us has a real answer. Fretting over "what could be" is not healthy. If you did not have a purpose for a SUR last year, you probably will not have a use for one next year. Simply buying something because it "might" get banned or restricted is just silly.