Will Mazda hint towards a new 7?

Nope: New things they are showing:

Mazda Ibuki: What the RX-Evolv was to the RX-8, the Ibuki is to the next Miata.

Turbo MX-5: Not sure if this is JDM only or not. ( I don't care, we're ROTARYnews, not Mazdanews)

Dyal Hydrogen/Gas RENESIS + other green tech

JDM Mazdaspeed RX-8: Mazdaspeed kit + parts from the factory, JDM only

Mazda 3/Axela: Prod debut.

Washu: 1st Shown at Detroit in Jan 03

Kusabi: 1st Shown at Frankfurt Sept 03

See this URL for more info:

http://www.media.mazda.com/product_info/2003tokyo/contents/top_en.html