Sorry for the long wait. You’re right, I publicly admit to being wrong, and concede on the point. I didn’t know what I was talking about, nor did I realize that a Starbrand user could die a natural death? I saw her recent battles but didn’t bother to continue watching the character. Not an excuse, but at that time my life was too hectic to even allow for me to read a comic.
I no longer even know how Marvel views a Starbrand wielder these days, and assumed that a retcon had never taken place. For the record and once again, you were right and I was wrong.
Re: Tony Stark and Batman Vs The Justice League & Avengers
Ok so the way I see it the answer is that Batman does better.
That's not to say they aren't equally capable of creating weapons or means to fight or defeat each member of the team they face. I could even accept an argument that Tony might edge Bruce in the weapon building but only just.
The thing is that as ODG said Bruce plays a more psychological game and also has more contingencies. Psychology isn't just about planning on the lines characters won't cross but using knowledge of how they fight and react to direct their actions or to guide their movements into a fall.
An example of how this works is the times Vrill Dox II has defeated his father Brainiac and his son. Both of whom are 12th level geniuses while he is only an10th. They are smarter than him but he is the better psychologist of the three. He plays their insecurities and neurocies against them. Like the time he shielded in his mind emotions his father couldn't deal with. He knew Brainiac's arrogance would have him break thru his mental blocks to learn what secrets were kept there. Having forced his way in he was in no position to defend or shield himself from the emotions Vrill knew he couldn't handle.
If the question was which one could come up with the best devices to take down the team probably Tony by a hair. If it came down to best attacks period equal but since Bruce can gain defeats without attacks and would have contingencies for of plan A, B or C failed he should have the greater success rate.