Engadget’s been invited to an Apple Event on Oct 20th, at 10am PT. As you can see from the invite, there’s a Lion hiding behind that logo making folks think Apple will preview ‘Lion’: The next version of the Mac OS. Hopefully new Mac hardware will make the rounds too, like a redesigned Mac Pro which still looks pretty much like a G5 from the outside. I’m also hopeful Apple’s redesigned Air will show up, which was rumored to have an 11″ screen. Engadget’ll be blogging the event live, so check them out next Wednesday for the minute-by-minute starting at 10am PT.