Kurt Tank percieved early the need for single-engined fighters in the zerstörer role and proposed the Ta152A/B to the RLM in sept/oct '43 as a replacement for the Bf110/Me410 fleet. The armament of the 152A/B would have been the MG151/20, two in front of the cockpit, two in the wing roots and two outboard. Topped off with a Mk108 or Mk103 engine mounted it would have been a potent package. The 152A/B would have used the Jumo 213A (which was later used in the FW190 D-9 with great success). At the time however (late '43) the 213A was a underpowered option to the BMW radials, and the RLM turned down the Ta152A/B types (B was intended for nachtjagd) for, as they put it, "it offers no advantages over existing types" (meaning the Bf109G and FW190A). They were wrong however in that regard, as the Ta152 had far bigger development potential as was later proven, both by the FW190D and the Ta152H.
Had the Ta152A/B types been given production status, they would have started coming off the lines by january-february of '44.