Road Warrior made a lot of good points and valid points.  1998 was very weak year for films.  
Godzilla sucked, it was laughable.  Armageddon would have been the only real competition for a Tim Burton Superman.  
1    Saving Private Ryan    DW    $216,540,909    2,807    $30,576,104    2,463    7/24
2    Armageddon    BV    $201,578,182    3,184    $36,089,972    3,127    7/1
3    There's Something About Mary    Fox    $176,484,651    2,555    $13,740,644    2,186    7/15
4    A Bug's Life    BV    $162,798,565    2,773    $291,121    1    11/20
5    The Waterboy    BV    $161,491,646    2,782    $39,414,071    2,664    11/6
6    Doctor Dolittle    Fox    $144,156,605    2,871    $29,014,324    2,777    6/26
7    Rush Hour    NL    $141,186,864    2,724    $33,001,803    2,638    9/18
8    Deep Impact    Par.    $140,464,664    3,280    $41,152,375    3,156    5/8
9    Godzilla    Sony    $136,314,294    3,310    $44,047,541    3,310    5/20
10    Patch Adams    Uni.    $135,026,902    2,909    $25,262,280    2,712    12/25
11    Lethal Weapon 4    WB    $130,444,603    3,117    $34,048,124    3,117    7/10
12    The Truman Show    Par.    $125,618,201    2,911    $31,542,121    2,315    6/5
13    Mulan    BV    $120,620,254    2,953    $22,745,143    2,888    6/19
14    You've Got Mail    WB    $115,821,495    2,948    $18,426,749    2,691    12/18
15    Enemy of the State    BV    $111,549,836    2,517    $20,038,573    2,393    11/20
16    The Prince of Egypt    DW    $101,413,188    3,218    $14,524,321    3,118    12/18
17    The Rugrats Movie    Par.    $100,494,675    2,832    $27,321,470    2,782    11/20
18    Shakespeare in Love    Mira.    $100,317,794    2,030    $224,012    8    12/11
19    The Mask of Zorro    Sony    $94,095,523    2,515    $22,525,855    2,515    7/17
20    Stepmom    Sony    $91,137,662    2,503    $19,142,440    2,358    12/25
Even if Tim Burton didn't do a better Superman film than Richard Donner, it still might have surpassed quiet a few of these films.  Stepmom, Waterboy, Patch Adams, Rugrats Movie, Youve Got Mail ? ?  No matter how bad Burton's vision of Superman turned out, it would have probably performed well at the box office due to lack of competition....
So what Nic Cage films did he do instead of Superman ? ? ? ?
Snake Eyes (ouch) & City of Angels