Yes as the title says Tekken will be making another Tekken Tag.
The Story (Tekkenpedia)
The possibly non-canon story focuses on Heihachi Mishima, former long-time CEO of the Mishima Zaibatsu, who, in the quest of understanding the process of aging, worked in secret to create a drug able to rejuvenate the human body and thus increase longevity. After many years of research, the wonder drug was finally complete. Without hesitation, Heihachi ingested the drug, and the effects were immediate: his body grew stronger, the signs of aging faded, and the hair on the top of his head grew back and turned black; he was young again!
Intent on showing his power to the world, he soon heard of a new Tekken Tournament to be held. "A tag team tournament?" he thought to himself. "I will need a partner then... Hmf! I'll use that." Thus the curtain was raised for a new tournament and a mystery tag team entering.
This game should be released between the Street Fighter x Tekken(Capcom Development) and Tekken x Street Fighter(Namco Development) games.
Knowing this information I now have 3 games I need to buy this summer.
King and Armor King will be the shit.