How can I get S1 orange hero?

Get coins from completing all levels of the daily challenge. Use those coins to buy fragments of the hero you want. Save up enough fragments to get the entire hero. It is extremely difficult. (Max daily challenge is 20 coins. It takes 100 coins for 5 shards. It takes 150 shards for the hero. So...you have to complete the max daily challenge 150 times)

The S1 specific heroes were available by Facebook comments early on.

They are also available at specific times in the game and require orange tickets to attempt to get one.

If they are available, they will be to the left of the normal super recruitment orange hero in Heroes Hall and you can use an orange ticket to try your luck.