Superman/Clark should tell Lois, she shouldnt find out. I think that'd be a good way to end the sequel.
Richard and Lois as a couple likely wont last beyond the next film. I'm sure Richard wont die but they will definately break up.
Maybe Clark decides to dance with Lois as some black tie event at the end and holds her just as Superman held her in SR... and then says the words "I'm always around."
That'd be a good scene, but they are setting it up so that Superman, Lois and Jason will be a family. I dont think the Lana 'confidant' thing would work here.
Well, that kind of slights Richard as a character. Plus, Clark having to tell Lois as opposed to her suspecting it from the onset (a la SII) makes her look kinda dumb.
I suppose you could have him get ready to tell her, just like in S:TM (which, since it's Singer, could conceivably happen) when Clark reaches for his glasses.
Clark: "Lois...there's something that I have to tell you...
Lois: "You're really Superman."
Clark: "I'm really Su...what?"

t:
Getting back to pics, some other things that might be neat to see down the road:
Conduit, wearing a recolored version of THIS suit
Some variation of this suit (based on Action Comics #659) built by John Henry Irons and later customized by Irons to use as Steel
Kara In-Ze, wearing this outfit only with

instead of an open chest (sorry, fellas

), no gloves, blue leggings and red boots
Hank Henshaw (looking similar to this particular Microman figure)