Two racing game ideas I have

[tofudue]

I have two ideas for racing games and I cant decide if i should combine them or not, add features etc. I also want some feedback.

Idea one:
All takes place in a single city(fictional)
All different types of racing(see below)
Legal or illegal: meaning race on a closed courses or an open city
player can choose path. Be legal or illegal
dricing style is somewhat arcade like.(unrealistic to a sense, like need for speed)

racing types:
Rally- on a dirt or snow road
Drag-down a line
Circuit-standard race
Drift-drifting in long courses or small courses
Haywire-autocross
Showboat-try to get style points/ Jump and stunt
One way-from point A to B
Collector-collect a bunch or things on a course
regular style online( lobby interface)

Idea two:
The game takes place on race islands(think hawaii but for cars)
island are split into 3 parts(inner, middle, outer)
The inner part(big island) is based on cites(tokyo for example)
the middle part is another part of a city(ex: the wangan in tokyo)
and the outer part is another part of that cities surrounding area(ex: mountains in japan, initial d)
They driving style is realestic yet not unforgiving to new players like forza
you start races by going up to another npc racer and flas your lights and suggest a race(adds to the realism?)
mmo online

So there are my ideas. I like them both, but I think that the second one is more ambitious. I would like to add online regular and mmo style to both if possible. I like features in both of them, des anyone think i should combine elents into one game?
oh, and in case no one caught this, when i develop the game I will work with A team of developers.

[starstutter]

"A man with a cowbow hat looks like a rancher. A man with a cap looks like a baseball player. A man with both looks like an idiot."

The reason for the rather dumb quote is so maybe you can avoid something called "kitchen sink design". Combining these wouldn't fit into that catagory, but it gets dangerously close. Kitchen Sink is just as it sounds, putting everything in the game except the kitchen sink. They're both good ideas, alothugh the first one may have been a little overdone (think Extreme G), and the seccond is not bad at all except for the MMO part.

The reson MMO isn't a good feature is because to have a great game, you need it to exist in the first place. Every day, litterally thousands of kids are thinking, "How will I make the next great MMO"... but I'm getting off point.

Anyway, I would advise against combining them, but expand on the second one a little more forgetting the MMO part, although multiplayer is certainly a real option.

-OR-

Try and change up the first idea some, maybe use something besides cars, motorcycles or the cleche old "futuristic speed bikes". Not implying that's what you had planned, a lot of people just fall into that trap.