The German forces had a long time to reinforce the coast of Europe during their occupation. They knew that, eventually, the Allies were bound to attempt a landing. When it finally came, they were as ready as possible. To represent that on your Flames of War tabletops, Battlefront has some new D-Day Germans that you can order from them now.
From the announcement:
Panther Tank Platoon (GBX161)
While the Panther tank is nominally a medium tank, its gun can penetrate any Allied tank with ease, while its own armour is difficult to penetrate in return. Their doctrine requires the panzer divisions to use their Panthers in heavy punches, smashing anything in their way to the objective, then withdraw them from the front line to prepare for the next attack.
Armoured Flame-thrower Platoon (GBX156)
Armoured flame-throwers like the Sd Kfz 251/16 half-track are successful terror weapons. With a flame-thrower spewing fire from each side, enemy infantry abandon their positions rather than be burned to death, clearing the way for the panzergrenadiers.
Grille 15cm Gun Platoon (GE151)
Unlike the lighter 7.5cm infantry gun, the 15cm howitzer couldn't be mounted aboard a Sd Kfz 251 half-track, so instead the Germans experimented with using several different out-dated tank chassis. By 1943, the result was the Grille (Cricket) self-propelled 15cm gun. This gave the panzergrenadiers their own high-calibre, mobile guns to shatter enemy strongholds.